CN103541559B - Reinforced composite board based on concrete bending member - Google Patents
Reinforced composite board based on concrete bending member Download PDFInfo
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- CN103541559B CN103541559B CN201310547509.3A CN201310547509A CN103541559B CN 103541559 B CN103541559 B CN 103541559B CN 201310547509 A CN201310547509 A CN 201310547509A CN 103541559 B CN103541559 B CN 103541559B
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- fibrous material
- reinforced composite
- strength mortar
- composite sheet
- strength
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- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 238000005452 bending Methods 0.000 title abstract description 3
- 239000002657 fibrous material Substances 0.000 claims abstract description 59
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 27
- 239000000835 fiber Substances 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 13
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 3
- 239000004917 carbon fiber Substances 0.000 claims abstract description 3
- 239000003365 glass fiber Substances 0.000 claims abstract description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000008187 granular material Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 15
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 14
- 239000011707 mineral Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000006378 damage Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention relates to the technical field of building structure reinforcing, in particular to a reinforced composite board based on a concrete bending member. The composite board is formed by two parts including high-strength mortar and a prestress fiber material. The fiber material comprises a carbon fiber sheet, a glass fiber sheet and the like. The high-strength mortar is connected with the fiber material through a certain amount of steel fiber in the special shape, and the fiber material and the high-strength mortar are effectively bonded to form the novel composite board. The composite board can effectively overcome the shortcoming that the fiber material is peeled and damaged after the structure is stressed due to the fact that the concrete surface is unsmooth, greatly improves fiber strength utilization rate and improves a reinforcing effect.
Description
Technical field
The present invention relates to Structures Reinforced Technique field, particularly relate to a kind of composite board reinforced based on concrete flexural member.
Background technology
China founded the state more than 60 anniversaries, and a large amount of buildings exceedes design reference period, and these building structure, bridge also exist potential safety hazard; In addition, even if do not reach building structure, the bridge of design reference period, due to China's expanding economy, the load that Old building, bridge bear increases day by day, causes the damage of building structure, bridge too; In addition a large amount of natural calamities also can cause the damage in various degree of a large amount of building structure, bridge.Thus, reinforce these structures, the reliability recovering its necessity becomes the important work of field of civil engineering one.In current numerous structural strengthening technology, the fibrous material reinforcing technique occurred in recent years is widely used with the advantage of its uniqueness, and the Heterosis of this reinforcing mode is: reinforcement material is lightweight, reinforce after the rigidity of structure and intensity is high, corrosion resistance high.But this technology also exists inborn defect, the concrete surface pasting fibrous material is not smooth, and the bondline thickness be coated with comparatively is difficult to ensure card usually.In this case, often occur the stripping damage of fibrous material when the component reinforced continues bearing load, stress when being peeling destruction on fibrous material is in reduced levels usually, and that is the intensity of fibrous material is not fully utilized.Thus cause the effect of this reinforcing to be had a greatly reduced quality.In order to overcome the problem of stripping damage, usually before stickup fibrous material, carry out prestressed stretch-draw, the low-down feature of the shear strength due to fiber to fibrous material, stretch-draw, anchoring fibrous material are very difficult, and corresponding construction technology is very complicated.In order to the intensity of fibrous material can be utilized fully, and simplify construction technology, be badly in need of a kind of composite consolidation sheet material based on fibrous material of exploitation.
Summary of the invention
The technical problem that the present invention mainly solves is the problem that during conventional concrete flexural member is reinforced, stripping damage easily occurs fibrous material.By fibrous material stretch-draw is compounded to form composite board with high-strength mortar, then to paste with reinforced structure.Thus solve the problem of fibrous material generation stripping damage.Improve the ability of reinforced structure carrying, namely structure has the functional requirement that enough reliabilitys meet structure.
The present invention is that a kind of novel concrete flexural member reinforces sheet material, this material be by pre-stretch-draw after fibrous material and the reinforcing sheet material that is compounded to form of high-strength mortar.Shown in Figure 1.
Fibrous material (carbon fiber plate, glass fibre sheet etc.) carries out pre-stretch-draw by facility, and the prestress value on fibrous material controls at 10MPa-40MPa, enables fibrous material ensure its planeness under the effect of pre-tensile stress.Because prestress value is in reduced levels, less demanding to tension construction technology, without the need to the tensioner of complexity.Shown in Figure 1.
The fibrous material being in tensile state is coated with and reinforces organic gel, guarantee that reinforcing organic gel can go deep into fiber fully.
Before the initial set of reinforcing organic gel; fibrous material is arranged the steel fibre of special shape; as shown in Figure 2; after ensureing that steel fibre and fibrous material bond; the vertical height of each steel fibre is not less than 10mm; not higher than the height of high-strength mortar, then perfuse the mineral granule (coarse sand granule of 4 ~ 6mm or handstone) through cleaning-drying uniformly at fibrous material surface.And ensure that this operation also completes before the initial set of reinforcing organic gel, as shown in Figure 3.
After the final set of reinforcing organic gel.On mineral granule, spread high-strength mortar, the intensity of high-strength mortar is not less than M30, thickness between 20mm ~ 30mm.
When high-strength mortar reaches 70% of design strength, remove the pretension on fibrous material, and the composite board size formed is revised.
Working mechanism of the present invention is summarized as follows:
The main cause that stripping damage occurs fibrous material on concrete flexural member is the out-of-flatness on flexural member surface.In order to address this problem, just require that fibrous material is in straightened condition all the time, in order to reach this object, in the manufacturing process of this reinforced composite sheet material, all the time pretension be applied to fibrous material, make it be in straightened condition.The pretension applied fibrous material can not be excessive, otherwise can produce distortion on the composite board formed, and the pre-tensile stress on fibrous material should control at 10MPa-40MPa.Because its prestress value is lower, stretch-draw is less demanding, so without the need to the tensioner of complexity and tensioning process.There is effective adhesive in order to what ensure high-strength mortar and fibrous material, fibrous material is pasted steel fibre (as shown in Figure 3) and the mineral granule of definite shape.Wherein, the effect of mineral granule increases fibrous material and the bonding with high-strength mortar.The effect of steel fibre has two aspects, and one, special shape due to steel fibre, a part can be bonded on fibrous material, and another part can be anchored in mortar, thus adds the connection between fibrous material and high-strength mortar, ensures bi-material co-operation; Two, the steel fibre part in high-strength mortar effectively can prevent generation and the expansion of the inner microcrack of matrix mortar material, enhance the performance of the tension of high-strength mortar, bending resistance, shock resistance and antifatigue, thus improve the strength and ductility of high-strength mortar, ensure that fibrous material can play the tensile strength of self more fully.
Accompanying drawing illustrates:
The front elevation view of accompanying drawing 1 composite board of the present invention and side elevational view.
Accompanying drawing 2 steel fibre and the mineral granule bonding situation top view on fibrous material.
Accompanying drawing 3 steel fibre and the mineral granule bonding situation right view on fibrous material.
Accompanying drawing 4 steel fibre and the mineral granule bonding situation elevation on fibrous material.
Accompanying drawing 5 the 1st kind of steel fibre schematic shapes.
Accompanying drawing 6 the 2nd kind of steel fibre schematic shapes.
In figure: 1-high-strength mortar, 2-fibrous material, the first steel fibre of 3-, 4-the second steel fibre, 5-mineral granule
Detailed description of the invention:
Below in conjunction with detailed description of the invention and accompanying drawing, the present invention is described in further detail.
The two ends of fibrous material, to fibrous material Shi Hanzhang, are anchored on straining device by the first step, carry out stretch-draw and ensure that fibrous material surface is straight, wait and stop stretch-draw after reaching prestress control value and keep prestressing force.
In the PVC template that fibrous material bottom pad glazing slippery is higher after second step stretch-draw, then on fiber, organic gel is reinforced in brushing, pastes the steel fibre of the special shape of some, mineral granule before glue initial set.
After 3rd step structure glue final set, on mineral granule, spread the high-strength mortar that thickness is 20mm-30mm, and carry out maintenance.
When 4th step waits until that high-strength mortar reaches 70% of design strength, remove the prestressing force on fibrous material, check that whether fiber is smooth, and the size of the composite board formed is revised.
Claims (6)
1. based on a reinforced composite sheet material for concrete flexural member, it is characterized in that: described reinforced composite sheet material is made up of high-strength mortar and fibrous material; Described fibrous material is carbon fiber plate or glass fibre sheet; Be connected with steel fibre by reinforcing organic gel, mineral granule between high-strength mortar and fibrous material; Described connection procedure comprises:
To fibrous material Shi Hanzhang, then on fibrous material, organic gel is reinforced in brushing, pastes steel fibre, mineral granule before glue initial set, after reinforcing organic gel final set, spreads high-strength mortar, and carry out maintenance on mineral granule.
2. a kind of reinforced composite sheet material based on concrete flexural member according to claim 1, is characterized in that: the mortar strength of high-strength mortar is not less than M30.
3. a kind of reinforced composite sheet material based on concrete flexural member according to claim 1, it is characterized in that: fibrous material is in pre-tensile state all the time in the fabrication process, the pre-tensile stress on fibrous material controls at 10MPa-40MPa.
4. a kind of reinforced composite sheet material based on concrete flexural member according to claim 1, is characterized in that: the steel fibre height be pasted onto on fibrous material is not less than 10mm, and the length of steel fiber being namely anchored in high-strength mortar is not less than 10mm.
5. a kind of reinforced composite sheet material based on concrete flexural member according to claim 1, is characterized in that: paste steel fibre on fibrous material after, pastes mineral granule, before this process ensures that reinforcing organic gel is in initial set.
6. a kind of reinforced composite sheet material based on concrete flexural member according to claim 1, it is characterized in that: after pre-stretch-draw is carried out to fibrous material, in the PVC template that its underpart pad glazing slippery is high, this fibrous material when preventing smearing high-strength mortar on fibrous material, is caused to bend.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310547509.3A CN103541559B (en) | 2013-11-07 | 2013-11-07 | Reinforced composite board based on concrete bending member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310547509.3A CN103541559B (en) | 2013-11-07 | 2013-11-07 | Reinforced composite board based on concrete bending member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103541559A CN103541559A (en) | 2014-01-29 |
| CN103541559B true CN103541559B (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310547509.3A Expired - Fee Related CN103541559B (en) | 2013-11-07 | 2013-11-07 | Reinforced composite board based on concrete bending member |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106555481B (en) * | 2016-10-27 | 2018-08-14 | 湖南大学 | The device and method of prestretching fiber composite board reinforced steel concrete flexural member |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100604A (en) * | 1986-01-20 | 1987-08-05 | 林祥孝 | Improved glass fibre concrete panels |
| JPH09242342A (en) * | 1996-03-08 | 1997-09-16 | Chem Form:Kk | Repair method of structure by carbon-fiber reinforced plastic sheet |
| JP2000220304A (en) * | 1999-02-03 | 2000-08-08 | Taisei Corp | Reinforcing method for concrete structure by carbon fiber sheet built-in cement-mortar composite plate |
| CN201074408Y (en) * | 2007-07-31 | 2008-06-18 | 上海维固工程实业有限公司 | Reinforced structure for ultra-high strength micro-steel fibre belt |
| CN203256955U (en) * | 2013-05-10 | 2013-10-30 | 南京倍立达新材料系统工程股份有限公司 | Three-dimensional cavity fiber structure reinforced cement machine-made board |
-
2013
- 2013-11-07 CN CN201310547509.3A patent/CN103541559B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100604A (en) * | 1986-01-20 | 1987-08-05 | 林祥孝 | Improved glass fibre concrete panels |
| JPH09242342A (en) * | 1996-03-08 | 1997-09-16 | Chem Form:Kk | Repair method of structure by carbon-fiber reinforced plastic sheet |
| JP2000220304A (en) * | 1999-02-03 | 2000-08-08 | Taisei Corp | Reinforcing method for concrete structure by carbon fiber sheet built-in cement-mortar composite plate |
| CN201074408Y (en) * | 2007-07-31 | 2008-06-18 | 上海维固工程实业有限公司 | Reinforced structure for ultra-high strength micro-steel fibre belt |
| CN203256955U (en) * | 2013-05-10 | 2013-10-30 | 南京倍立达新材料系统工程股份有限公司 | Three-dimensional cavity fiber structure reinforced cement machine-made board |
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| CN103541559A (en) | 2014-01-29 |
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